Enhancing visible luminescence in sprayed-ZnO nanostructure through Cu doping
Cu-doped ZnO (CZO) is a low-cost, oxide-friendly material synthesized in various ratios (0%, 1%, 2%, and 3%) via spray pyrolysis on a glass substrate at 350 °C. SEM images revealed that the CZO films consist of aggregated spherical nanoparticles, each with a diameter of less than 20 nm. XRD and Rama...
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| Format: | Article |
| Language: | English |
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AIP Publishing LLC
2025-01-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/5.0237396 |
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| author | Fatima Zohra Bedia Asma Bedia Sidi Mohammed Bedia Nabila Maloufi Michel Aillerie Khadidja Rahmoun |
| author_facet | Fatima Zohra Bedia Asma Bedia Sidi Mohammed Bedia Nabila Maloufi Michel Aillerie Khadidja Rahmoun |
| author_sort | Fatima Zohra Bedia |
| collection | DOAJ |
| description | Cu-doped ZnO (CZO) is a low-cost, oxide-friendly material synthesized in various ratios (0%, 1%, 2%, and 3%) via spray pyrolysis on a glass substrate at 350 °C. SEM images revealed that the CZO films consist of aggregated spherical nanoparticles, each with a diameter of less than 20 nm. XRD and Raman measurements confirmed that the CZO thin films exhibit a polycrystalline wurtzite structure with a preferential 101̄1 orientation. The role of defects influencing the luminescence behavior of CZO films in the visible spectrum was investigated. Increasing the Cu content in ZnO crystals enhanced and produced four distinct color emissions in the visible photoluminescence spectrum: blue, green, yellow, and red. This rare occurrence in sprayed ZnO films is attributed to various defects, with the most prominent one being oxygen vacancies (Vo+–Vo++), zinc interstitials (Zni), and oxygen interstitials (Oi). Notably, the defects significantly decreased with the addition of 2 at. % Cu, unequivocally linked to the emergence of Zn vacancies (VZn). An increase in defects in the ZnO crystal leads to bandgap narrowing, from 3.273 to 3.202 eV. This study demonstrates that CZO films, synthesized through a cost-effective and straightforward method, are well-suited for optoelectronic applications. |
| format | Article |
| id | doaj-art-32c74bef01d14c40b61190a065ac69b0 |
| institution | Kabale University |
| issn | 2158-3226 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | AIP Publishing LLC |
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| series | AIP Advances |
| spelling | doaj-art-32c74bef01d14c40b61190a065ac69b02025-02-03T16:40:42ZengAIP Publishing LLCAIP Advances2158-32262025-01-01151015109015109-910.1063/5.0237396Enhancing visible luminescence in sprayed-ZnO nanostructure through Cu dopingFatima Zohra Bedia0Asma Bedia1Sidi Mohammed Bedia2Nabila Maloufi3Michel Aillerie4Khadidja Rahmoun5Department of Physics, Faculty of Science, Blida 1 University, 09000 Blida, AlgeriaDepartment of Renewable Energy, Faculty of Technology, Blida 1 University, 09000 Blida, AlgeriaFaculty of Technology, Abou-Bakr Belkaid University, 13000 Tlemcen, AlgeriaLEM3, UMR-CNRS 7239, University of Lorraine, F-57045 Metz, FranceLMOPS, Centrale Supélec, University of Lorraine, F-57070 Metz, FranceURMER, Abou-Bakr Belkaid University, 13000 Tlemcen, AlgeriaCu-doped ZnO (CZO) is a low-cost, oxide-friendly material synthesized in various ratios (0%, 1%, 2%, and 3%) via spray pyrolysis on a glass substrate at 350 °C. SEM images revealed that the CZO films consist of aggregated spherical nanoparticles, each with a diameter of less than 20 nm. XRD and Raman measurements confirmed that the CZO thin films exhibit a polycrystalline wurtzite structure with a preferential 101̄1 orientation. The role of defects influencing the luminescence behavior of CZO films in the visible spectrum was investigated. Increasing the Cu content in ZnO crystals enhanced and produced four distinct color emissions in the visible photoluminescence spectrum: blue, green, yellow, and red. This rare occurrence in sprayed ZnO films is attributed to various defects, with the most prominent one being oxygen vacancies (Vo+–Vo++), zinc interstitials (Zni), and oxygen interstitials (Oi). Notably, the defects significantly decreased with the addition of 2 at. % Cu, unequivocally linked to the emergence of Zn vacancies (VZn). An increase in defects in the ZnO crystal leads to bandgap narrowing, from 3.273 to 3.202 eV. This study demonstrates that CZO films, synthesized through a cost-effective and straightforward method, are well-suited for optoelectronic applications.http://dx.doi.org/10.1063/5.0237396 |
| spellingShingle | Fatima Zohra Bedia Asma Bedia Sidi Mohammed Bedia Nabila Maloufi Michel Aillerie Khadidja Rahmoun Enhancing visible luminescence in sprayed-ZnO nanostructure through Cu doping AIP Advances |
| title | Enhancing visible luminescence in sprayed-ZnO nanostructure through Cu doping |
| title_full | Enhancing visible luminescence in sprayed-ZnO nanostructure through Cu doping |
| title_fullStr | Enhancing visible luminescence in sprayed-ZnO nanostructure through Cu doping |
| title_full_unstemmed | Enhancing visible luminescence in sprayed-ZnO nanostructure through Cu doping |
| title_short | Enhancing visible luminescence in sprayed-ZnO nanostructure through Cu doping |
| title_sort | enhancing visible luminescence in sprayed zno nanostructure through cu doping |
| url | http://dx.doi.org/10.1063/5.0237396 |
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